# HTTP Proxy Server :
1) How HTTP proxy server keeps system as anonymous?
2) What is secure socket layer (SSL)?
3) How is Proxy Server different from Open DNS?
2) What is secure socket layer (SSL)?
3) How is Proxy Server different from Open DNS?
# Protocol Stack:
1)Wat is the role of presentation layer in transfer of data?
2) How does routing selection happen in network layer?
# Questions by-
Team Noesis (CC 6)
# Members-
2) How does routing selection happen in network layer?
# Questions by-
Team Noesis (CC 6)
# Members-
- Sourav
- Renuka
- Siddesh
- Masoud
2 comments:
HTTP proxy server
Ans1. An anonymous proxy server (sometimes called a web proxy) generally attempts to anonymize web surfing. The server receives requests from the anonymizing proxy server, and thus does not receive information about the end user's address. However, the requests are not anonymous to the anonymizing proxy server, and so a degree of trust is present between that server and the user.
An anonymous proxy server is a special kind of proxy loaded with software that erases your IP address from any page requests and substitutes its own. When the page is sent back by the Web server, the proxy server then forwards it along to you free of any additional software scripts that might compromise your identity.
The most popular kind of anonymous proxy servers are Web-based proxies. All you have to do is go to the Web site of the proxy service, enter the desired URL in a special address box and the service will relay the request to the Web server anonymously.
Ans2. Security of data in transit over the Internet becomes increasingly necessary because of steadily growing data volume and importance. Nowadays, every user of a public network sends various types of data, from email to credit card details daily, and he would therefore like them to be protected when in transit over a public network. To this end, a practical SSL protocol has been adopted for protection of data in transit that encompasses all network services that use TCP/IP to support typical application tasks of communication between servers and clients.
SSL is designed to make use of TCP as a communication layer to provide a reliable end-to-end secure and authenticated connection between two points over a network (for example between the service client and the server).t is used mostly in HTTP server and client applications.
The main objective of this layer is:
1.Authenticating the client and server to each other: the SSL protocol supports the use of standard key cryptographic techniques (public key encryption) to authenticate the communicating parties to each other. Though the most frequent application consists in authenticating the service client on the basis of a certificate, SSL may also use the same methods to authenticate the client.
2.Ensuring data integrity: during a session, data cannot be either intentionally or unintentionally tampered with.
3.Securing data privacy: data in transport between the client and the server must be protected from interception and be readable only by the intended recipient. This prerequisite is necessary for both the data associated with the protocol itself (securing traffic during negotiations) and the application data that is sent during the session itself. SSL is in fact not a single protocol but rather a set of protocols that can additionally be further divided in two layers:
a) the protocol to ensure data security and integrity: this layer is composed of the SSL Record Protocol,
b) the protocols that are designed to establish an SSL connection: three protocols are used in this layer: the SSL Handshake Protocol, the SSL ChangeCipher SpecPprotocol and the SSL alter protocol.
BY CC7
the role of presentation layer in transfer of data..
This layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer works to transform data into the form that the application layer can accept. This layer formats and encrypts data to be sent across a network,i.e to carry sensitive information,the sender transforms the original information to another form and sends the resulting msg over the network.decription reverses the original process to transform the msg back to its original form . It is sometimes called the syntax layer.
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